hydrostatic press



,exact description.

i' y iYnnosTA'rro rnnss specification of Letters Patent No. 662, dated March 28, 1838i.

To all whom it may concern:

Be it known that I, EDWARD MERRILIJ, of New Bedford, in the county of Bristol and State of Massachusetts, have invented anew and Improved Mode of Pressing`` Oil by the Help of the Common Hydrostatic Cylinder and Piston orRam; and Ido hereby dejclare that the following is a true, full, and

The nature of my invention' consists in placing two'pieces of square or flat timber of the necessary-size horizontally one above the other, 'at any required distance as A, A, in the drawings, which can be of any length according to the number of presses that are wanted, the upper timber to be sawed in to perpendicularly to receive the guide bars,

` and bolted together; B, B, uprighttimbers with grooves in the inner sides to receive the guide bars Gr, partially tenoned into A, A, and placed at any distance apart that presses are wanted to be in widthLC, cylinder, one to be placed over each press; D,

piston or ram with a transverse groove in p the upper end cut down even with the cylinder when the press is down; in the draw e ings it is represented as partly up.

E, is a small iron roller cut just as long as the groove is wide, and let one third of its diameter into the center of the groove in the piston as represented by the dotted lines on the head of the piston; F, F, F, the cap; a piece of cast iron with a perpendicular groove in each -end to receive the guide bars G, and the upper edge of the ends concave for the heads of the guide bars to rest on-whioh serves to keep them in their places. The center of the lower edge of the cap is fitted into the groove in head of the iston across the roller E which is let one i third of its diameter into the center of the lower edge of the cap which serves to keep the cap in its place,` and at the same time giving it' a chance for the ends to play up and down to equalize the stress on the guide bars; G, G, guide bars, flat pieces of iron which pass through the upper timber A, and half their width in the grooves (as represented in the dotted lines) in' the timbers B, B, down to the follower H, with their upper ends fitted into the grooves in the ends of the caps with kn'ife edged heads above resting on the concave ends of the cap which serves to keep them in their places and at the same time giving them a chance to cant if necessary without altering thelr `posltions in regard to the center; I, I,

.concave shoulders to the guide bars placed far enough from the edge of`the bars that go into the tlmbers to allow the bars to slide up and down in the grooves in the timbers B, B, 'Without the shoulders coming in contact with the wood; H, follower, a flat piece of' wood or metal with a perpendicular groove in each end to receive that part Vof the guide bars that projects out from the timbers'B, B, and with a transverse concave groove in the under side of each to fit upon the shoulders of the guide barsfI, I, which serve to keep the bars from spreading at the same time leaving them at liberty to play up and down and `equalize the strain.

O, O, is the main, pipe coming from the i pump and'passing. the cylinder of each press (if two or more are connected together) and connected to each cylinder by afshort pipe which contains the stop cock as at P; any one or the whole of these stop cocks being open we are enabled to pump or work" up any one or the whole of thepresses at once with the same pump or by opening a stop cockfor letting ofl the water placed near the'pump -on the main` pipe and all the others, the presses will all go down themselves or open the one on the main pipe, and any one of the others and the press will go down while the rest remain stationary.

The space between H and the upper timber A is the place to receive the plates and bags of oil or stuff that is to be pressed the plates fitting on to the guide bars the same as in the usual way of pressing oil.

M, M, M, areplank fitted with a: close joint on the lower timber A in the form of aatrough to catch the oil fromythe .press which is let ofi by the pipe N. This trough obviates the necessity ofa cistern below as used `in the 'old fashioned presses. By lengthening the timbers A, A, and inserting one more timber B, and continuing the trough we have a frame for another press and so it can be continued to any number with little expense and having the cylinders ina line on one'timber the main pipe can be connected with each and one forcing pump can work them Vall which obviates the necessity and expense of providing eachpress with a separate pump.

The advantages that my presses possess What I clam as my nventon and deover any others are that they cost only about Vsre to secure by Letters Patent s- 10 one-half as much as the hydrostatc presses The mode of connectngv the pston with now in: use nasmuch as t requires about theifollower in themannerabovedescrbed. four thousand pounds less iron to make one w EDW. MERRILL. and obvates the necessity of more than one VVVitnesses: i w I' pump for several presses andztakes up less t GEORGELL BERRY, room and answers a better purpose. i BEN-J. RODMAN. 

